Air brush



FIG. 1 is a top plan view of an air brush showing my new design;

FIG. 2 is a front elevational view thereof, the rear being a mirror image of the front shown;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an elevational view taken from one end thereof; and

FIG. 5 is an elevational view taken from the end opposite that shown in FIG. 4. 

The ornamental design for an air brush, substantially as shown and described. 